When the PLC is running, a pulse is executed at the beginning. When the PLC starts running, it is turned on, and then the screen is disconnected. As long as the PLC is powered on and the operation mode of the PLC is switched to the operation mode, a pulse will be turned on, and the time of this pulse is the time of a scanning cycle. You can open some initialization programs.

Pulse usually refers to a short-term fluctuating electric shock voltage or current commonly used in electronic technology. Its main characteristics are waveform, amplitude, width and repetition frequency. The pulse shaping program can produce different pulse waveforms, and the optimal pulse waveform is different according to different applications.